Crude extract from tamarind (Tamarindus indica L.) husk, lemongrass (Cymbopogon citratus Stapf.) and citronella (Cymbopogon nardus Rendle.) residues inhibited seed germination and growth of popping pod (Ruellia tuberosa Linn.) | ????????????????????????????????? (Tamarindus indica L.) ?????????? (Cymbopogon citratus Stapf.) ???????????? (Cymbopogon nardus Rendle.) ????????????????????????????????????????? (Ruellia tuberosa Linn.)
2019
Siriphan Sukkhaeng(Kasetsart University. Kamphaeng Saen Campus, Nakhon Pathom (Thailand). Faculty of Agriculture at Kamphaeng Saen. Research and Academic Service Center. Central Laboratory and Greenhouse Complex) | Somnuk Promdang(Kasetsart University. Kamphaeng Saen Campus, Nakhon Pathom (Thailand). Faculty of Agriculture at Kamphaeng Saen. Research and Academic Service Center. Central Laboratory and Greenhouse Complex) | Atinut Saejiew(Kasetsart University. Kamphaeng Saen Campus, Nakhon Pathom (Thailand). Faculty of Agriculture at Kamphaeng Saen. Research and Academic Service Center. Central Laboratory and Greenhouse Complex) | Srisom Suwanwong(Kasetsart University, Bangkok (Thailand). Faculty of Science. Department of Botany)
The objective of this research was to investigate the efficacy of extracts from tamarind husk, lemongrass and citronella residues to inhibit seed germination and growth of popping pod. All residues were extracted with water and 80 percent methanol and subjected to germination and seedling growth bioassay in Petri dish at concentrations of 0, 1.25, 2.5, 5 and 10 percent. The results showed that aqueous and methanolic extracts from 3 residues could inhibit the germination and growth of popping pod. The crude extract from 80 percent methanol had higher inhibitory effect on germination and growth than the aqueous extract with more effective inhibition when the concentration had been increased. Methanolic extract from lemongrass and citronella at the concentration of 10 percent showed the best inhibitory effects. In conclusion, lemongrass and citronella extracts might be a safe alternative for popping pod control to reduce the use of synthetic herbicides
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